2004 Volkswagen Passat TDI Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2004 Volkswagen Passat TDI
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2004 Volkswagen Passat TDI ProblemsCheck Engine Light Due to Faulty Torque ConverterFlasher Relay Failure Can Cause Erratic Turn Signal Operation
Erratic turn signal operation can be a result of a failing turn signal flasher relay which will require replacement.
Because of issues with the glow plugs and/or the glow plug wiring harness from the control relay, the Check Engine Light may illuminate. Our technicians tell us there is a service bulletin, not a recall from Volkswagen regarding replacement of the glow plugs on 2004-2005 model years only.